Power Grid

As the country roasted last week under extreme heat made more intense by climate change, tens of thousands of Americans received text messages telling them they could get paid if they powered down their devices and appliances during specific periods of the day. If their homes were equipped with smart thermostats or smart water heaters, the devices may have powered down automatically. It may have seemed like a simple action to conserve energy during hours of peak demand. But behind the scenes, a number of companies that have emerged in recent years were working with utilities to monitor and respond to the stress on the grid as people blasted air conditioners to stave off the blistering heat.